Login with Facebook hangs with animation but no action

Try logging in via Facebook at http://www.MyURL.com/wp-login.php

also try

Signing up via Facebook at http://www.MyURL.com/wp-signup.php

See what happens...looks like nothing. The page hangs with a blue animation of short vertical bars. The user logs in but there is no indication of this. Also the user registers but is kept on the same page with this animation

Support Access granted

Please reply with
1) Reason this is happening
2) Kindly fix this and let me know what you did to fix it. Thank you in advance